The hypodermic theory,it was introduced in 1902s; it  is the first attempt to explain how audience react to mass media, it shows that people react to things differently. it suggests that audience do not try to process or challenge the information. in todays society its known most obsolete. it's also still quoted during moral panics (computer games, violent films etc.
Uses & gratifications:
Uses and gratifications theory states that people use media texts in different reasons. however unlike the hypodermic needle model U and G theory argues that it's: ... not what does the media do to people, but what do people do with the media'.